The Angelo Décor 20-foot by 20-foot PVC Pond Liner is Reinforced with a Lightweight yet Strong Fiber-Mesh that is a Great Value Solution to Creating a Decorative or Functional Pond in the 16 foot by 16 foot by 1.5-foot-deep range. Providing Sturdy and Secure Containment for up to 2800 Gallons, this Pond Liner is Flexible enough to Install Custom Pond Shapes and Sizes. Large Size allows this liner to be used in a 1 piece installation of a Pondless Waterfall. Made from 15 mil thick PVC Material that is Puncture and UV resistant, and has a Textured Surface that will Promote Beneficial Bacteria Growth. Safe for Fish and Plants.